<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
		<title>DOM操作-练习</title>
		<style type="text/css">
			body {
				font-size: 13px;
				line-height: 25px;
			}
			table {
				border-top: 1px solid #333;
				border-left: 1px solid #333;
				width: 300px;
			}
			td {
				border-right: 1px solid #333;
				border-bottom: 1px solid #333;
			}
			.center {
				text-align: center;
			}
		</style>
		<script src="js/jquery-3.5.1.min.js"></script>
		<script>
			//179000516 王德令
			function addRow(){
				var newRow = $("<tr></tr>");
				var col1 = $("<td>幸福从天而降</td>")
				var col2 = $("<td>&yen;18.50</td>").attr({align:"center"});
				newRow.append(col1);
				newRow.append(col2);
				$("#row2").after(newRow);
			}
			function updateRow() {
				var uRow = $("#row1");
				//标题行设置为字体加粗、文本居中显示，背景颜色为灰色
				uRow.attr("style", "font-weight:bold;text-align:center;background-color: #cccccc;");
			}
			function delRow() {
				var dRow = $("tr");           //访问被删除的行
				if(dRow[2]!=null){
					dRow[2].remove(dRow[2]);  //删除行
				}
			}
			function copyRow() {
				var oldRow = $("#row3");      //访问复制的行
				var newRow = oldRow.clone();  //复制指定的行及子节点
				$("#myTable").append(newRow); //在指定节点的末尾添加行
			}			
		</script>
	</head>
	<body>
		<table border="0" cellspacing="0" cellpadding="0" id="myTable">
			<tr id="row1">
				<td>书名</td>
				<td>价格</td>
			</tr>
			<tr id="row2">
				<td>看得见风景的房间</td>
				<td class="center">&yen;30.00</td>
			</tr>
			<tr id="row3">
				<td>60个瞬间</td>
				<td class="center">&yen;32.00</td>
			</tr>
		</table>
		<input name="b1" type="button" value="增加一行" onclick="addRow()" />
		<input name="b2" type="button" value="删除第2行" onclick="delRow()" />
		<input name="b3" type="button" value="修改标题样式" onclick="updateRow()" />
		<input name="b4" type="button" value="复制最后一行" onclick="copyRow()" />
	</body>
</html>